import {EventDispatcher, MOUSE, Quaternion, Spherical, TOUCH, Vector2, Vector3} from '../../three.module.min.js';

// This set of controls performs orbiting, dollying (zooming), and panning.
// Unlike TrackballControls, it maintains the "up" direction object.up (+Y by default).
//
//    Orbit - left mouse / touch: one-finger move
//    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
//    Pan - right mouse, or left mouse + ctrl/meta/shiftKey, or arrow keys / touch: two-finger move

const _changeEvent = {type: 'change'};
const _startEvent = {type: 'start'};
const _endEvent = {type: 'end'};

class OrbitControls extends EventDispatcher {

  constructor(object, domElement) {

    super();

    if (domElement === undefined) console.warn('THREE.OrbitControls: The second parameter "domElement" is now mandatory.');
    if (domElement === document) console.error('THREE.OrbitControls: "document" should not be used as the target "domElement". Please use "renderer.domElement" instead.');

    this.object = object;
    this.domElement = domElement;
    this.domElement.style.touchAction = 'none'; // disable touch scroll

    // Set to false to disable this control
    this.enabled = true;

    // "target" sets the location of focus, where the object orbits around
    this.target = new Vector3();

    // How far you can dolly in and out ( PerspectiveCamera only )
    this.minDistance = 0;
    this.maxDistance = Infinity;

    // How far you can zoom in and out ( OrthographicCamera only )
    this.minZoom = 0;
    this.maxZoom = Infinity;

    // How far you can orbit vertically, upper and lower limits.
    // Range is 0 to Math.PI radians.
    this.minPolarAngle = 0; // radians
    this.maxPolarAngle = Math.PI; // radians

    // How far you can orbit horizontally, upper and lower limits.
    // If set, the interval [ min, max ] must be a sub-interval of [ - 2 PI, 2 PI ], with ( max - min < 2 PI )
    this.minAzimuthAngle = -Infinity; // radians
    this.maxAzimuthAngle = Infinity; // radians

    // Set to true to enable damping (inertia)
    // If damping is enabled, you must call controls.update() in your animation loop
    this.enableDamping = false;
    this.dampingFactor = 0.05;

    // This option actually enables dollying in and out; left as "zoom" for backwards compatibility.
    // Set to false to disable zooming
    this.enableZoom = true;
    this.zoomSpeed = 1.0;

    // Set to false to disable rotating
    this.enableRotate = true;
    this.rotateSpeed = 1.0;

    // Set to false to disable panning
    this.enablePan = true;
    this.panSpeed = 1.0;
    this.screenSpacePanning = true; // if false, pan orthogonal to world-space direction camera.up
    this.keyPanSpeed = 7.0;	// pixels moved per arrow key push

    // Set to true to automatically rotate around the target
    // If auto-rotate is enabled, you must call controls.update() in your animation loop
    this.autoRotate = false;
    this.autoRotateSpeed = 2.0; // 30 seconds per orbit when fps is 60

    // The four arrow keys
    this.keys = {LEFT: 'ArrowLeft', UP: 'ArrowUp', RIGHT: 'ArrowRight', BOTTOM: 'ArrowDown'};

    // Mouse buttons
    this.mouseButtons = {LEFT: MOUSE.ROTATE, MIDDLE: MOUSE.DOLLY, RIGHT: MOUSE.PAN};

    // Touch fingers
    this.touches = {ONE: TOUCH.ROTATE, TWO: TOUCH.DOLLY_PAN};

    // for reset
    this.target0 = this.target.clone();
    this.position0 = this.object.position.clone();
    this.zoom0 = this.object.zoom;

    // the target DOM element for key events
    this._domElementKeyEvents = null;

    //
    // public methods
    //

    this.getPolarAngle = function () {

      return spherical.phi;

    };

    this.getAzimuthalAngle = function () {

      return spherical.theta;

    };

    this.getDistance = function () {

      return this.object.position.distanceTo(this.target);

    };

    this.listenToKeyEvents = function (domElement) {

      domElement.addEventListener('keydown', onKeyDown);
      this._domElementKeyEvents = domElement;

    };

    this.saveState = function () {

      scope.target0.copy(scope.target);
      scope.position0.copy(scope.object.position);
      scope.zoom0 = scope.object.zoom;

    };

    this.reset = function () {

      scope.target.copy(scope.target0);
      scope.object.position.copy(scope.position0);
      scope.object.zoom = scope.zoom0;

      scope.object.updateProjectionMatrix();
      scope.dispatchEvent(_changeEvent);

      scope.update();

      state = STATE.NONE;

    };

    // this method is exposed, but perhaps it would be better if we can make it private...
    this.update = function () {

      const offset = new Vector3();

      // so camera.up is the orbit axis
      const quat = new Quaternion().setFromUnitVectors(object.up, new Vector3(0, 1, 0));
      const quatInverse = quat.clone().invert();

      const lastPosition = new Vector3();
      const lastQuaternion = new Quaternion();

      const twoPI = 2 * Math.PI;

      return function update() {

        const position = scope.object.position;

        offset.copy(position).sub(scope.target);

        // rotate offset to "y-axis-is-up" space
        offset.applyQuaternion(quat);

        // angle from z-axis around y-axis
        spherical.setFromVector3(offset);

        if (scope.autoRotate && state === STATE.NONE) {

          rotateLeft(getAutoRotationAngle());

        }

        if (scope.enableDamping) {

          spherical.theta += sphericalDelta.theta * scope.dampingFactor;
          spherical.phi += sphericalDelta.phi * scope.dampingFactor;

        } else {

          spherical.theta += sphericalDelta.theta;
          spherical.phi += sphericalDelta.phi;

        }

        // restrict theta to be between desired limits

        let min = scope.minAzimuthAngle;
        let max = scope.maxAzimuthAngle;

        if (isFinite(min) && isFinite(max)) {

          if (min < -Math.PI) min += twoPI; else if (min > Math.PI) min -= twoPI;

          if (max < -Math.PI) max += twoPI; else if (max > Math.PI) max -= twoPI;

          if (min <= max) {

            spherical.theta = Math.max(min, Math.min(max, spherical.theta));

          } else {

            spherical.theta = (spherical.theta > (min + max) / 2) ?
              Math.max(min, spherical.theta) :
              Math.min(max, spherical.theta);

          }

        }

        // restrict phi to be between desired limits
        spherical.phi = Math.max(scope.minPolarAngle, Math.min(scope.maxPolarAngle, spherical.phi));

        spherical.makeSafe();


        spherical.radius *= scale;

        // restrict radius to be between desired limits
        spherical.radius = Math.max(scope.minDistance, Math.min(scope.maxDistance, spherical.radius));

        // move target to panned location

        if (scope.enableDamping === true) {

          scope.target.addScaledVector(panOffset, scope.dampingFactor);

        } else {

          scope.target.add(panOffset);

        }

        offset.setFromSpherical(spherical);

        // rotate offset back to "camera-up-vector-is-up" space
        offset.applyQuaternion(quatInverse);

        position.copy(scope.target).add(offset);

        scope.object.lookAt(scope.target);

        if (scope.enableDamping === true) {

          sphericalDelta.theta *= (1 - scope.dampingFactor);
          sphericalDelta.phi *= (1 - scope.dampingFactor);

          panOffset.multiplyScalar(1 - scope.dampingFactor);

        } else {

          sphericalDelta.set(0, 0, 0);

          panOffset.set(0, 0, 0);

        }

        scale = 1;

        // update condition is:
        // min(camera displacement, camera rotation in radians)^2 > EPS
        // using small-angle approximation cos(x/2) = 1 - x^2 / 8

        if (zoomChanged ||
          lastPosition.distanceToSquared(scope.object.position) > EPS ||
          8 * (1 - lastQuaternion.dot(scope.object.quaternion)) > EPS) {

          scope.dispatchEvent(_changeEvent);

          lastPosition.copy(scope.object.position);
          lastQuaternion.copy(scope.object.quaternion);
          zoomChanged = false;

          return true;

        }

        return false;

      };

    }();

    this.dispose = function () {

      scope.domElement.removeEventListener('contextmenu', onContextMenu);

      scope.domElement.removeEventListener('pointerdown', onPointerDown);
      scope.domElement.removeEventListener('pointercancel', onPointerCancel);
      scope.domElement.removeEventListener('wheel', onMouseWheel);

      scope.domElement.removeEventListener('pointermove', onPointerMove);
      scope.domElement.removeEventListener('pointerup', onPointerUp);


      if (scope._domElementKeyEvents !== null) {

        scope._domElementKeyEvents.removeEventListener('keydown', onKeyDown);

      }

      //scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?

    };

    //
    // internals
    //

    const scope = this;

    const STATE = {
      NONE: -1,
      ROTATE: 0,
      DOLLY: 1,
      PAN: 2,
      TOUCH_ROTATE: 3,
      TOUCH_PAN: 4,
      TOUCH_DOLLY_PAN: 5,
      TOUCH_DOLLY_ROTATE: 6
    };

    let state = STATE.NONE;

    const EPS = 0.000001;

    // current position in spherical coordinates
    const spherical = new Spherical();
    const sphericalDelta = new Spherical();

    let scale = 1;
    const panOffset = new Vector3();
    let zoomChanged = false;

    const rotateStart = new Vector2();
    const rotateEnd = new Vector2();
    const rotateDelta = new Vector2();

    const panStart = new Vector2();
    const panEnd = new Vector2();
    const panDelta = new Vector2();

    const dollyStart = new Vector2();
    const dollyEnd = new Vector2();
    const dollyDelta = new Vector2();

    const pointers = [];
    const pointerPositions = {};

    function getAutoRotationAngle() {

      return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;

    }

    function getZoomScale() {

      return Math.pow(0.95, scope.zoomSpeed);

    }

    function rotateLeft(angle) {

      sphericalDelta.theta -= angle;

    }

    function rotateUp(angle) {

      sphericalDelta.phi -= angle;

    }

    const panLeft = function () {

      const v = new Vector3();

      return function panLeft(distance, objectMatrix) {

        v.setFromMatrixColumn(objectMatrix, 0); // get X column of objectMatrix
        v.multiplyScalar(-distance);

        panOffset.add(v);

      };

    }();

    const panUp = function () {

      const v = new Vector3();

      return function panUp(distance, objectMatrix) {

        if (scope.screenSpacePanning === true) {

          v.setFromMatrixColumn(objectMatrix, 1);

        } else {

          v.setFromMatrixColumn(objectMatrix, 0);
          v.crossVectors(scope.object.up, v);

        }

        v.multiplyScalar(distance);

        panOffset.add(v);

      };

    }();

    // deltaX and deltaY are in pixels; right and down are positive
    const pan = function () {

      const offset = new Vector3();

      return function pan(deltaX, deltaY) {

        const element = scope.domElement;

        if (scope.object.isPerspectiveCamera) {

          // perspective
          const position = scope.object.position;
          offset.copy(position).sub(scope.target);
          let targetDistance = offset.length();

          // half of the fov is center to top of screen
          targetDistance *= Math.tan((scope.object.fov / 2) * Math.PI / 180.0);

          // we use only clientHeight here so aspect ratio does not distort speed
          panLeft(2 * deltaX * targetDistance / element.clientHeight, scope.object.matrix);
          panUp(2 * deltaY * targetDistance / element.clientHeight, scope.object.matrix);

        } else if (scope.object.isOrthographicCamera) {

          // orthographic
          panLeft(deltaX * (scope.object.right - scope.object.left) / scope.object.zoom / element.clientWidth, scope.object.matrix);
          panUp(deltaY * (scope.object.top - scope.object.bottom) / scope.object.zoom / element.clientHeight, scope.object.matrix);

        } else {

          // camera neither orthographic nor perspective
          console.warn('WARNING: OrbitControls.js encountered an unknown camera type - pan disabled.');
          scope.enablePan = false;

        }

      };

    }();

    function dollyOut(dollyScale) {

      if (scope.object.isPerspectiveCamera) {

        scale /= dollyScale;

      } else if (scope.object.isOrthographicCamera) {

        scope.object.zoom = Math.max(scope.minZoom, Math.min(scope.maxZoom, scope.object.zoom * dollyScale));
        scope.object.updateProjectionMatrix();
        zoomChanged = true;

      } else {

        console.warn('WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.');
        scope.enableZoom = false;

      }

    }

    function dollyIn(dollyScale) {

      if (scope.object.isPerspectiveCamera) {

        scale *= dollyScale;

      } else if (scope.object.isOrthographicCamera) {

        scope.object.zoom = Math.max(scope.minZoom, Math.min(scope.maxZoom, scope.object.zoom / dollyScale));
        scope.object.updateProjectionMatrix();
        zoomChanged = true;

      } else {

        console.warn('WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.');
        scope.enableZoom = false;

      }

    }

    //
    // event callbacks - update the object state
    //

    function handleMouseDownRotate(event) {

      rotateStart.set(event.clientX, event.clientY);

    }

    function handleMouseDownDolly(event) {

      dollyStart.set(event.clientX, event.clientY);

    }

    function handleMouseDownPan(event) {

      panStart.set(event.clientX, event.clientY);

    }

    function handleMouseMoveRotate(event) {

      rotateEnd.set(event.clientX, event.clientY);

      rotateDelta.subVectors(rotateEnd, rotateStart).multiplyScalar(scope.rotateSpeed);

      const element = scope.domElement;

      rotateLeft(2 * Math.PI * rotateDelta.x / element.clientHeight); // yes, height

      rotateUp(2 * Math.PI * rotateDelta.y / element.clientHeight);

      rotateStart.copy(rotateEnd);

      scope.update();

    }

    function handleMouseMoveDolly(event) {

      dollyEnd.set(event.clientX, event.clientY);

      dollyDelta.subVectors(dollyEnd, dollyStart);

      if (dollyDelta.y > 0) {

        dollyOut(getZoomScale());

      } else if (dollyDelta.y < 0) {

        dollyIn(getZoomScale());

      }

      dollyStart.copy(dollyEnd);

      scope.update();

    }

    function handleMouseMovePan(event) {

      panEnd.set(event.clientX, event.clientY);

      panDelta.subVectors(panEnd, panStart).multiplyScalar(scope.panSpeed);

      pan(panDelta.x, panDelta.y);

      panStart.copy(panEnd);

      scope.update();

    }

    function handleMouseWheel(event) {

      if (event.deltaY < 0) {

        dollyIn(getZoomScale());

      } else if (event.deltaY > 0) {

        dollyOut(getZoomScale());

      }

      scope.update();

    }

    function handleKeyDown(event) {

      let needsUpdate = false;

      switch (event.code) {

        case scope.keys.UP:
          pan(0, scope.keyPanSpeed);
          needsUpdate = true;
          break;

        case scope.keys.BOTTOM:
          pan(0, -scope.keyPanSpeed);
          needsUpdate = true;
          break;

        case scope.keys.LEFT:
          pan(scope.keyPanSpeed, 0);
          needsUpdate = true;
          break;

        case scope.keys.RIGHT:
          pan(-scope.keyPanSpeed, 0);
          needsUpdate = true;
          break;

      }

      if (needsUpdate) {

        // prevent the browser from scrolling on cursor keys
        event.preventDefault();

        scope.update();

      }


    }

    function handleTouchStartRotate() {

      if (pointers.length === 1) {

        rotateStart.set(pointers[0].pageX, pointers[0].pageY);

      } else {

        const x = 0.5 * (pointers[0].pageX + pointers[1].pageX);
        const y = 0.5 * (pointers[0].pageY + pointers[1].pageY);

        rotateStart.set(x, y);

      }

    }

    function handleTouchStartPan() {

      if (pointers.length === 1) {

        panStart.set(pointers[0].pageX, pointers[0].pageY);

      } else {

        const x = 0.5 * (pointers[0].pageX + pointers[1].pageX);
        const y = 0.5 * (pointers[0].pageY + pointers[1].pageY);

        panStart.set(x, y);

      }

    }

    function handleTouchStartDolly() {

      const dx = pointers[0].pageX - pointers[1].pageX;
      const dy = pointers[0].pageY - pointers[1].pageY;

      const distance = Math.sqrt(dx * dx + dy * dy);

      dollyStart.set(0, distance);

    }

    function handleTouchStartDollyPan() {

      if (scope.enableZoom) handleTouchStartDolly();

      if (scope.enablePan) handleTouchStartPan();

    }

    function handleTouchStartDollyRotate() {

      if (scope.enableZoom) handleTouchStartDolly();

      if (scope.enableRotate) handleTouchStartRotate();

    }

    function handleTouchMoveRotate(event) {

      if (pointers.length == 1) {

        rotateEnd.set(event.pageX, event.pageY);

      } else {

        const position = getSecondPointerPosition(event);

        const x = 0.5 * (event.pageX + position.x);
        const y = 0.5 * (event.pageY + position.y);

        rotateEnd.set(x, y);

      }

      rotateDelta.subVectors(rotateEnd, rotateStart).multiplyScalar(scope.rotateSpeed);

      const element = scope.domElement;

      rotateLeft(2 * Math.PI * rotateDelta.x / element.clientHeight); // yes, height

      rotateUp(2 * Math.PI * rotateDelta.y / element.clientHeight);

      rotateStart.copy(rotateEnd);

    }

    function handleTouchMovePan(event) {

      if (pointers.length === 1) {

        panEnd.set(event.pageX, event.pageY);

      } else {

        const position = getSecondPointerPosition(event);

        const x = 0.5 * (event.pageX + position.x);
        const y = 0.5 * (event.pageY + position.y);

        panEnd.set(x, y);

      }

      panDelta.subVectors(panEnd, panStart).multiplyScalar(scope.panSpeed);

      pan(panDelta.x, panDelta.y);

      panStart.copy(panEnd);

    }

    function handleTouchMoveDolly(event) {

      const position = getSecondPointerPosition(event);

      const dx = event.pageX - position.x;
      const dy = event.pageY - position.y;

      const distance = Math.sqrt(dx * dx + dy * dy);

      dollyEnd.set(0, distance);

      dollyDelta.set(0, Math.pow(dollyEnd.y / dollyStart.y, scope.zoomSpeed));

      dollyOut(dollyDelta.y);

      dollyStart.copy(dollyEnd);

    }

    function handleTouchMoveDollyPan(event) {

      if (scope.enableZoom) handleTouchMoveDolly(event);

      if (scope.enablePan) handleTouchMovePan(event);

    }

    function handleTouchMoveDollyRotate(event) {

      if (scope.enableZoom) handleTouchMoveDolly(event);

      if (scope.enableRotate) handleTouchMoveRotate(event);

    }

    //
    // event handlers - FSM: listen for events and reset state
    //

    function onPointerDown(event) {

      if (scope.enabled === false) return;

      if (pointers.length === 0) {

        scope.domElement.setPointerCapture(event.pointerId);

        scope.domElement.addEventListener('pointermove', onPointerMove);
        scope.domElement.addEventListener('pointerup', onPointerUp);

      }

      //

      addPointer(event);

      if (event.pointerType === 'touch') {

        onTouchStart(event);

      } else {

        onMouseDown(event);

      }

    }

    function onPointerMove(event) {

      if (scope.enabled === false) return;

      if (event.pointerType === 'touch') {

        onTouchMove(event);

      } else {

        onMouseMove(event);

      }

    }

    function onPointerUp(event) {

      removePointer(event);

      if (pointers.length === 0) {

        scope.domElement.releasePointerCapture(event.pointerId);

        scope.domElement.removeEventListener('pointermove', onPointerMove);
        scope.domElement.removeEventListener('pointerup', onPointerUp);

      }

      scope.dispatchEvent(_endEvent);

      state = STATE.NONE;

    }

    function onPointerCancel(event) {

      removePointer(event);

    }

    function onMouseDown(event) {

      let mouseAction;

      switch (event.button) {

        case 0:

          mouseAction = scope.mouseButtons.LEFT;
          break;

        case 1:

          mouseAction = scope.mouseButtons.MIDDLE;
          break;

        case 2:

          mouseAction = scope.mouseButtons.RIGHT;
          break;

        default:

          mouseAction = -1;

      }

      switch (mouseAction) {

        case MOUSE.DOLLY:

          if (scope.enableZoom === false) return;

          handleMouseDownDolly(event);

          state = STATE.DOLLY;

          break;

        case MOUSE.ROTATE:

          if (event.ctrlKey || event.metaKey || event.shiftKey) {

            if (scope.enablePan === false) return;

            handleMouseDownPan(event);

            state = STATE.PAN;

          } else {

            if (scope.enableRotate === false) return;

            handleMouseDownRotate(event);

            state = STATE.ROTATE;

          }

          break;

        case MOUSE.PAN:

          if (event.ctrlKey || event.metaKey || event.shiftKey) {

            if (scope.enableRotate === false) return;

            handleMouseDownRotate(event);

            state = STATE.ROTATE;

          } else {

            if (scope.enablePan === false) return;

            handleMouseDownPan(event);

            state = STATE.PAN;

          }

          break;

        default:

          state = STATE.NONE;

      }

      if (state !== STATE.NONE) {

        scope.dispatchEvent(_startEvent);

      }

    }

    function onMouseMove(event) {

      if (scope.enabled === false) return;

      switch (state) {

        case STATE.ROTATE:

          if (scope.enableRotate === false) return;

          handleMouseMoveRotate(event);

          break;

        case STATE.DOLLY:

          if (scope.enableZoom === false) return;

          handleMouseMoveDolly(event);

          break;

        case STATE.PAN:

          if (scope.enablePan === false) return;

          handleMouseMovePan(event);

          break;

      }

    }

    function onMouseWheel(event) {

      if (scope.enabled === false || scope.enableZoom === false || state !== STATE.NONE) return;

      event.preventDefault();

      scope.dispatchEvent(_startEvent);

      handleMouseWheel(event);

      scope.dispatchEvent(_endEvent);

    }

    function onKeyDown(event) {

      if (scope.enabled === false || scope.enablePan === false) return;

      handleKeyDown(event);

    }

    function onTouchStart(event) {

      trackPointer(event);

      switch (pointers.length) {

        case 1:

          switch (scope.touches.ONE) {

            case TOUCH.ROTATE:

              if (scope.enableRotate === false) return;

              handleTouchStartRotate();

              state = STATE.TOUCH_ROTATE;

              break;

            case TOUCH.PAN:

              if (scope.enablePan === false) return;

              handleTouchStartPan();

              state = STATE.TOUCH_PAN;

              break;

            default:

              state = STATE.NONE;

          }

          break;

        case 2:

          switch (scope.touches.TWO) {

            case TOUCH.DOLLY_PAN:

              if (scope.enableZoom === false && scope.enablePan === false) return;

              handleTouchStartDollyPan();

              state = STATE.TOUCH_DOLLY_PAN;

              break;

            case TOUCH.DOLLY_ROTATE:

              if (scope.enableZoom === false && scope.enableRotate === false) return;

              handleTouchStartDollyRotate();

              state = STATE.TOUCH_DOLLY_ROTATE;

              break;

            default:

              state = STATE.NONE;

          }

          break;

        default:

          state = STATE.NONE;

      }

      if (state !== STATE.NONE) {

        scope.dispatchEvent(_startEvent);

      }

    }

    function onTouchMove(event) {

      trackPointer(event);

      switch (state) {

        case STATE.TOUCH_ROTATE:

          if (scope.enableRotate === false) return;

          handleTouchMoveRotate(event);

          scope.update();

          break;

        case STATE.TOUCH_PAN:

          if (scope.enablePan === false) return;

          handleTouchMovePan(event);

          scope.update();

          break;

        case STATE.TOUCH_DOLLY_PAN:

          if (scope.enableZoom === false && scope.enablePan === false) return;

          handleTouchMoveDollyPan(event);

          scope.update();

          break;

        case STATE.TOUCH_DOLLY_ROTATE:

          if (scope.enableZoom === false && scope.enableRotate === false) return;

          handleTouchMoveDollyRotate(event);

          scope.update();

          break;

        default:

          state = STATE.NONE;

      }

    }

    function onContextMenu(event) {

      if (scope.enabled === false) return;

      event.preventDefault();

    }

    function addPointer(event) {

      pointers.push(event);

    }

    function removePointer(event) {

      delete pointerPositions[event.pointerId];

      for (let i = 0; i < pointers.length; i++) {

        if (pointers[i].pointerId == event.pointerId) {

          pointers.splice(i, 1);
          return;

        }

      }

    }

    function trackPointer(event) {

      let position = pointerPositions[event.pointerId];

      if (position === undefined) {

        position = new Vector2();
        pointerPositions[event.pointerId] = position;

      }

      position.set(event.pageX, event.pageY);

    }

    function getSecondPointerPosition(event) {

      const pointer = (event.pointerId === pointers[0].pointerId) ? pointers[1] : pointers[0];

      return pointerPositions[pointer.pointerId];

    }

    //

    scope.domElement.addEventListener('contextmenu', onContextMenu);

    scope.domElement.addEventListener('pointerdown', onPointerDown);
    scope.domElement.addEventListener('pointercancel', onPointerCancel);
    scope.domElement.addEventListener('wheel', onMouseWheel, {passive: false});

    // force an update at start

    this.update();

  }

}


// This set of controls performs orbiting, dollying (zooming), and panning.
// Unlike TrackballControls, it maintains the "up" direction object.up (+Y by default).
// This is very similar to OrbitControls, another set of touch behavior
//
//    Orbit - right mouse, or left mouse + ctrl/meta/shiftKey / touch: two-finger rotate
//    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
//    Pan - left mouse, or arrow keys / touch: one-finger move

class MapControls extends OrbitControls {

  constructor(object, domElement) {

    super(object, domElement);

    this.screenSpacePanning = false; // pan orthogonal to world-space direction camera.up

    this.mouseButtons.LEFT = MOUSE.PAN;
    this.mouseButtons.RIGHT = MOUSE.ROTATE;

    this.touches.ONE = TOUCH.PAN;
    this.touches.TWO = TOUCH.DOLLY_ROTATE;

  }

}

export {OrbitControls, MapControls};
